fs/cifs/cifs_debug.c

   1 /*
   2  *   fs/cifs_debug.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2000,2005
   5  *
   6  *   Modified by Steve French (sfrench@us.ibm.com)
   7  *
   8  *   This program is free software;  you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16  *   the GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program;  if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22 #include <linux/fs.h>
  23 #include <linux/string.h>
  24 #include <linux/ctype.h>
  25 #include <linux/module.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/uaccess.h>
  28 #include "cifspdu.h"
  29 #include "cifsglob.h"
  30 #include "cifsproto.h"
  31 #include "cifs_debug.h"
  32 #include "cifsfs.h"
  33 #ifdef CONFIG_CIFS_DFS_UPCALL
  34 #include "dfs_cache.h"
  35 #endif
  36 #ifdef CONFIG_CIFS_SMB_DIRECT
  37 #include "smbdirect.h"
  38 #endif
  39
  40 void
  41 cifs_dump_mem(char *label, void *data, int length)
  42 {
  43         pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data);
  44         print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
  45                        data, length, true);
  46 }
  47
  48 void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
  49 {
  50 #ifdef CONFIG_CIFS_DEBUG2
  51         struct smb_hdr *smb = (struct smb_hdr *)buf;
  52
  53         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n",
  54                  smb->Command, smb->Status.CifsError,
  55                  smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
  56         cifs_dbg(VFS, "smb buf %p len %u\n", smb,
  57                  server->ops->calc_smb_size(smb, server));
  58 #endif /* CONFIG_CIFS_DEBUG2 */
  59 }
  60
  61 void cifs_dump_mids(struct TCP_Server_Info *server)
  62 {
  63 #ifdef CONFIG_CIFS_DEBUG2
  64         struct list_head *tmp;
  65         struct mid_q_entry *mid_entry;
  66
  67         if (server == NULL)
  68                 return;
  69
  70         cifs_dbg(VFS, "Dump pending requests:\n");
  71         spin_lock(&GlobalMid_Lock);
  72         list_for_each(tmp, &server->pending_mid_q) {
  73                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
  74                 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
  75                          mid_entry->mid_state,
  76                          le16_to_cpu(mid_entry->command),
  77                          mid_entry->pid,
  78                          mid_entry->callback_data,
  79                          mid_entry->mid);
  80 #ifdef CONFIG_CIFS_STATS2
  81                 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n",
  82                          mid_entry->large_buf,
  83                          mid_entry->resp_buf,
  84                          mid_entry->when_received,
  85                          jiffies);
  86 #endif /* STATS2 */
  87                 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n",
  88                          mid_entry->multiRsp, mid_entry->multiEnd);
  89                 if (mid_entry->resp_buf) {
  90                         cifs_dump_detail(mid_entry->resp_buf, server);
  91                         cifs_dump_mem("existing buf: ",
  92                                 mid_entry->resp_buf, 62);
  93                 }
  94         }
  95         spin_unlock(&GlobalMid_Lock);
  96 #endif /* CONFIG_CIFS_DEBUG2 */
  97 }
  98
  99 #ifdef CONFIG_PROC_FS
 100 static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
 101 {
 102         __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
 103
 104         seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count);
 105         if (tcon->nativeFileSystem)
 106                 seq_printf(m, "Type: %s ", tcon->nativeFileSystem);
 107         seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d",
 108                    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 109                    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 110                    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 111                    tcon->tidStatus);
 112         if (dev_type == FILE_DEVICE_DISK)
 113                 seq_puts(m, " type: DISK ");
 114         else if (dev_type == FILE_DEVICE_CD_ROM)
 115                 seq_puts(m, " type: CDROM ");
 116         else
 117                 seq_printf(m, " type: %d ", dev_type);
 118
 119         seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
 120
 121         if ((tcon->seal) ||
 122             (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 123             (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 124                 seq_printf(m, " Encrypted");
 125         if (tcon->nocase)
 126                 seq_printf(m, " nocase");
 127         if (tcon->unix_ext)
 128                 seq_printf(m, " POSIX Extensions");
 129         if (tcon->ses->server->ops->dump_share_caps)
 130                 tcon->ses->server->ops->dump_share_caps(m, tcon);
 131
 132         if (tcon->need_reconnect)
 133                 seq_puts(m, "\tDISCONNECTED ");
 134         seq_putc(m, '\n');
 135 }
 136
 137 static void
 138 cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
 139 {
 140         struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr;
 141         struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr;
 142
 143         seq_printf(m, "\tSpeed: %zu bps\n", iface->speed);
 144         seq_puts(m, "\t\tCapabilities: ");
 145         if (iface->rdma_capable)
 146                 seq_puts(m, "rdma ");
 147         if (iface->rss_capable)
 148                 seq_puts(m, "rss ");
 149         seq_putc(m, '\n');
 150         if (iface->sockaddr.ss_family == AF_INET)
 151                 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr);
 152         else if (iface->sockaddr.ss_family == AF_INET6)
 153                 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr);
 154 }
 155
 156 static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
 157 {
 158         struct list_head *stmp, *tmp, *tmp1, *tmp2;
 159         struct TCP_Server_Info *server;
 160         struct cifs_ses *ses;
 161         struct cifs_tcon *tcon;
 162         struct cifsFileInfo *cfile;
 163
 164         seq_puts(m, "# Version:1\n");
 165         seq_puts(m, "# Format:\n");
 166         seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>");
 167 #ifdef CONFIG_CIFS_DEBUG2
 168         seq_printf(m, " <filename> <mid>\n");
 169 #else
 170         seq_printf(m, " <filename>\n");
 171 #endif /* CIFS_DEBUG2 */
 172         spin_lock(&cifs_tcp_ses_lock);
 173         list_for_each(stmp, &cifs_tcp_ses_list) {
 174                 server = list_entry(stmp, struct TCP_Server_Info,
 175                                     tcp_ses_list);
 176                 list_for_each(tmp, &server->smb_ses_list) {
 177                         ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 178                         list_for_each(tmp1, &ses->tcon_list) {
 179                                 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
 180                                 spin_lock(&tcon->open_file_lock);
 181                                 list_for_each(tmp2, &tcon->openFileList) {
 182                                         cfile = list_entry(tmp2, struct cifsFileInfo,
 183                                                      tlist);
 184                                         seq_printf(m,
 185                                                 "0x%x 0x%llx 0x%x %d %d %d %s",
 186                                                 tcon->tid,
 187                                                 cfile->fid.persistent_fid,
 188                                                 cfile->f_flags,
 189                                                 cfile->count,
 190                                                 cfile->pid,
 191                                                 from_kuid(&init_user_ns, cfile->uid),
 192                                                 cfile->dentry->d_name.name);
 193 #ifdef CONFIG_CIFS_DEBUG2
 194                                         seq_printf(m, " 0x%llx\n", cfile->fid.mid);
 195 #else
 196                                         seq_printf(m, "\n");
 197 #endif /* CIFS_DEBUG2 */
 198                                 }
 199                                 spin_unlock(&tcon->open_file_lock);
 200                         }
 201                 }
 202         }
 203         spin_unlock(&cifs_tcp_ses_lock);
 204         seq_putc(m, '\n');
 205         return 0;
 206 }
 207
 208 static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 209 {
 210         struct list_head *tmp1, *tmp2, *tmp3;
 211         struct mid_q_entry *mid_entry;
 212         struct TCP_Server_Info *server;
 213         struct cifs_ses *ses;
 214         struct cifs_tcon *tcon;
 215         int i, j;
 216
 217         seq_puts(m,
 218                     "Display Internal CIFS Data Structures for Debugging\n"
 219                     "---------------------------------------------------\n");
 220         seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
 221         seq_printf(m, "Features:");
 222 #ifdef CONFIG_CIFS_DFS_UPCALL
 223         seq_printf(m, " DFS");
 224 #endif
 225 #ifdef CONFIG_CIFS_FSCACHE
 226         seq_printf(m, ",FSCACHE");
 227 #endif
 228 #ifdef CONFIG_CIFS_SMB_DIRECT
 229         seq_printf(m, ",SMB_DIRECT");
 230 #endif
 231 #ifdef CONFIG_CIFS_STATS2
 232         seq_printf(m, ",STATS2");
 233 #else
 234         seq_printf(m, ",STATS");
 235 #endif
 236 #ifdef CONFIG_CIFS_DEBUG2
 237         seq_printf(m, ",DEBUG2");
 238 #elif defined(CONFIG_CIFS_DEBUG)
 239         seq_printf(m, ",DEBUG");
 240 #endif
 241 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 242         seq_printf(m, ",ALLOW_INSECURE_LEGACY");
 243 #endif
 244 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 245         seq_printf(m, ",WEAK_PW_HASH");
 246 #endif
 247 #ifdef CONFIG_CIFS_POSIX
 248         seq_printf(m, ",CIFS_POSIX");
 249 #endif
 250 #ifdef CONFIG_CIFS_UPCALL
 251         seq_printf(m, ",UPCALL(SPNEGO)");
 252 #endif
 253 #ifdef CONFIG_CIFS_XATTR
 254         seq_printf(m, ",XATTR");
 255 #endif
 256 #ifdef CONFIG_CIFS_ACL
 257         seq_printf(m, ",ACL");
 258 #endif
 259         seq_putc(m, '\n');
 260         seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
 261         seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
 262         seq_printf(m, "Servers:");
 263
 264         i = 0;
 265         spin_lock(&cifs_tcp_ses_lock);
 266         list_for_each(tmp1, &cifs_tcp_ses_list) {
 267                 server = list_entry(tmp1, struct TCP_Server_Info,
 268                                     tcp_ses_list);
 269
 270 #ifdef CONFIG_CIFS_SMB_DIRECT
 271                 if (!server->rdma)
 272                         goto skip_rdma;
 273
 274                 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 275                         "transport status: %x",
 276                         server->smbd_conn->protocol,
 277                         server->smbd_conn->transport_status);
 278                 seq_printf(m, "\nConn receive_credit_max: %x "
 279                         "send_credit_target: %x max_send_size: %x",
 280                         server->smbd_conn->receive_credit_max,
 281                         server->smbd_conn->send_credit_target,
 282                         server->smbd_conn->max_send_size);
 283                 seq_printf(m, "\nConn max_fragmented_recv_size: %x "
 284                         "max_fragmented_send_size: %x max_receive_size:%x",
 285                         server->smbd_conn->max_fragmented_recv_size,
 286                         server->smbd_conn->max_fragmented_send_size,
 287                         server->smbd_conn->max_receive_size);
 288                 seq_printf(m, "\nConn keep_alive_interval: %x "
 289                         "max_readwrite_size: %x rdma_readwrite_threshold: %x",
 290                         server->smbd_conn->keep_alive_interval,
 291                         server->smbd_conn->max_readwrite_size,
 292                         server->smbd_conn->rdma_readwrite_threshold);
 293                 seq_printf(m, "\nDebug count_get_receive_buffer: %x "
 294                         "count_put_receive_buffer: %x count_send_empty: %x",
 295                         server->smbd_conn->count_get_receive_buffer,
 296                         server->smbd_conn->count_put_receive_buffer,
 297                         server->smbd_conn->count_send_empty);
 298                 seq_printf(m, "\nRead Queue count_reassembly_queue: %x "
 299                         "count_enqueue_reassembly_queue: %x "
 300                         "count_dequeue_reassembly_queue: %x "
 301                         "fragment_reassembly_remaining: %x "
 302                         "reassembly_data_length: %x "
 303                         "reassembly_queue_length: %x",
 304                         server->smbd_conn->count_reassembly_queue,
 305                         server->smbd_conn->count_enqueue_reassembly_queue,
 306                         server->smbd_conn->count_dequeue_reassembly_queue,
 307                         server->smbd_conn->fragment_reassembly_remaining,
 308                         server->smbd_conn->reassembly_data_length,
 309                         server->smbd_conn->reassembly_queue_length);
 310                 seq_printf(m, "\nCurrent Credits send_credits: %x "
 311                         "receive_credits: %x receive_credit_target: %x",
 312                         atomic_read(&server->smbd_conn->send_credits),
 313                         atomic_read(&server->smbd_conn->receive_credits),
 314                         server->smbd_conn->receive_credit_target);
 315                 seq_printf(m, "\nPending send_pending: %x "
 316                         "send_payload_pending: %x",
 317                         atomic_read(&server->smbd_conn->send_pending),
 318                         atomic_read(&server->smbd_conn->send_payload_pending));
 319                 seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 320                         "count_empty_packet_queue: %x",
 321                         server->smbd_conn->count_receive_queue,
 322                         server->smbd_conn->count_empty_packet_queue);
 323                 seq_printf(m, "\nMR responder_resources: %x "
 324                         "max_frmr_depth: %x mr_type: %x",
 325                         server->smbd_conn->responder_resources,
 326                         server->smbd_conn->max_frmr_depth,
 327                         server->smbd_conn->mr_type);
 328                 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x",
 329                         atomic_read(&server->smbd_conn->mr_ready_count),
 330                         atomic_read(&server->smbd_conn->mr_used_count));
 331 skip_rdma:
 332 #endif
 333                 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 334                         server->credits,  server->dialect);
 335                 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
 336                         seq_printf(m, " COMPRESS_LZNT1");
 337                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
 338                         seq_printf(m, " COMPRESS_LZ77");
 339                 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
 340                         seq_printf(m, " COMPRESS_LZ77_HUFF");
 341                 if (server->sign)
 342                         seq_printf(m, " signed");
 343                 if (server->posix_ext_supported)
 344                         seq_printf(m, " posix");
 345
 346                 i++;
 347                 list_for_each(tmp2, &server->smb_ses_list) {
 348                         ses = list_entry(tmp2, struct cifs_ses,
 349                                          smb_ses_list);
 350                         if ((ses->serverDomain == NULL) ||
 351                                 (ses->serverOS == NULL) ||
 352                                 (ses->serverNOS == NULL)) {
 353                                 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ",
 354                                         i, ses->serverName, ses->ses_count,
 355                                         ses->capabilities, ses->status);
 356                                 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
 357                                         seq_printf(m, "Guest\t");
 358                                 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 359                                         seq_printf(m, "Anonymous\t");
 360                         } else {
 361                                 seq_printf(m,
 362                                     "\n%d) Name: %s  Domain: %s Uses: %d OS:"
 363                                     " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 364                                     " session status: %d ",
 365                                 i, ses->serverName, ses->serverDomain,
 366                                 ses->ses_count, ses->serverOS, ses->serverNOS,
 367                                 ses->capabilities, ses->status);
 368                         }
 369                         if (server->rdma)
 370                                 seq_printf(m, "RDMA\n\t");
 371                         seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To "
 372                                    "Server: %d SecMode: 0x%x Req On Wire: %d",
 373                                    server->tcpStatus,
 374                                    server->reconnect_instance,
 375                                    server->srv_count,
 376                                    server->sec_mode, in_flight(server));
 377
 378 #ifdef CONFIG_CIFS_STATS2
 379                         seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 380                                 atomic_read(&server->in_send),
 381                                 atomic_read(&server->num_waiters));
 382 #endif
 383                         if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 384                                 seq_puts(m, " encrypted");
 385                         if (ses->sign)
 386                                 seq_puts(m, " signed");
 387
 388                         seq_puts(m, "\n\tShares:");
 389                         j = 0;
 390
 391                         seq_printf(m, "\n\t%d) IPC: ", j);
 392                         if (ses->tcon_ipc)
 393                                 cifs_debug_tcon(m, ses->tcon_ipc);
 394                         else
 395                                 seq_puts(m, "none\n");
 396
 397                         list_for_each(tmp3, &ses->tcon_list) {
 398                                 tcon = list_entry(tmp3, struct cifs_tcon,
 399                                                   tcon_list);
 400                                 ++j;
 401                                 seq_printf(m, "\n\t%d) ", j);
 402                                 cifs_debug_tcon(m, tcon);
 403                         }
 404
 405                         seq_puts(m, "\n\tMIDs:\n");
 406
 407                         spin_lock(&GlobalMid_Lock);
 408                         list_for_each(tmp3, &server->pending_mid_q) {
 409                                 mid_entry = list_entry(tmp3, struct mid_q_entry,
 410                                         qhead);
 411                                 seq_printf(m, "\tState: %d com: %d pid:"
 412                                               " %d cbdata: %p mid %llu\n",
 413                                               mid_entry->mid_state,
 414                                               le16_to_cpu(mid_entry->command),
 415                                               mid_entry->pid,
 416                                               mid_entry->callback_data,
 417                                               mid_entry->mid);
 418                         }
 419                         spin_unlock(&GlobalMid_Lock);
 420
 421                         spin_lock(&ses->iface_lock);
 422                         if (ses->iface_count)
 423                                 seq_printf(m, "\n\tServer interfaces: %zu\n",
 424                                            ses->iface_count);
 425                         for (j = 0; j < ses->iface_count; j++) {
 426                                 seq_printf(m, "\t%d)", j);
 427                                 cifs_dump_iface(m, &ses->iface_list[j]);
 428                         }
 429                         spin_unlock(&ses->iface_lock);
 430                 }
 431         }
 432         spin_unlock(&cifs_tcp_ses_lock);
 433         seq_putc(m, '\n');
 434
 435         /* BB add code to dump additional info such as TCP session info now */
 436         return 0;
 437 }
 438
 439 static ssize_t cifs_stats_proc_write(struct file *file,
 440                 const char __user *buffer, size_t count, loff_t *ppos)
 441 {
 442         bool bv;
 443         int rc;
 444         struct list_head *tmp1, *tmp2, *tmp3;
 445         struct TCP_Server_Info *server;
 446         struct cifs_ses *ses;
 447         struct cifs_tcon *tcon;
 448
 449         rc = kstrtobool_from_user(buffer, count, &bv);
 450         if (rc == 0) {
 451 #ifdef CONFIG_CIFS_STATS2
 452                 int i;
 453
 454                 atomic_set(&totBufAllocCount, 0);
 455                 atomic_set(&totSmBufAllocCount, 0);
 456 #endif /* CONFIG_CIFS_STATS2 */
 457                 atomic_set(&tcpSesReconnectCount, 0);
 458                 atomic_set(&tconInfoReconnectCount, 0);
 459
 460                 spin_lock(&GlobalMid_Lock);
 461                 GlobalMaxActiveXid = 0;
 462                 GlobalCurrentXid = 0;
 463                 spin_unlock(&GlobalMid_Lock);
 464                 spin_lock(&cifs_tcp_ses_lock);
 465                 list_for_each(tmp1, &cifs_tcp_ses_list) {
 466                         server = list_entry(tmp1, struct TCP_Server_Info,
 467                                             tcp_ses_list);
 468 #ifdef CONFIG_CIFS_STATS2
 469                         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 470                                 atomic_set(&server->num_cmds[i], 0);
 471                                 atomic_set(&server->smb2slowcmd[i], 0);
 472                                 server->time_per_cmd[i] = 0;
 473                                 server->slowest_cmd[i] = 0;
 474                                 server->fastest_cmd[0] = 0;
 475                         }
 476 #endif /* CONFIG_CIFS_STATS2 */
 477                         list_for_each(tmp2, &server->smb_ses_list) {
 478                                 ses = list_entry(tmp2, struct cifs_ses,
 479                                                  smb_ses_list);
 480                                 list_for_each(tmp3, &ses->tcon_list) {
 481                                         tcon = list_entry(tmp3,
 482                                                           struct cifs_tcon,
 483                                                           tcon_list);
 484                                         atomic_set(&tcon->num_smbs_sent, 0);
 485                                         spin_lock(&tcon->stat_lock);
 486                                         tcon->bytes_read = 0;
 487                                         tcon->bytes_written = 0;
 488                                         spin_unlock(&tcon->stat_lock);
 489                                         if (server->ops->clear_stats)
 490                                                 server->ops->clear_stats(tcon);
 491                                 }
 492                         }
 493                 }
 494                 spin_unlock(&cifs_tcp_ses_lock);
 495         } else {
 496                 return rc;
 497         }
 498
 499         return count;
 500 }
 501
 502 static int cifs_stats_proc_show(struct seq_file *m, void *v)
 503 {
 504         int i;
 505 #ifdef CONFIG_CIFS_STATS2
 506         int j;
 507 #endif /* STATS2 */
 508         struct list_head *tmp1, *tmp2, *tmp3;
 509         struct TCP_Server_Info *server;
 510         struct cifs_ses *ses;
 511         struct cifs_tcon *tcon;
 512
 513         seq_printf(m, "Resources in use\nCIFS Session: %d\n",
 514                         sesInfoAllocCount.counter);
 515         seq_printf(m, "Share (unique mount targets): %d\n",
 516                         tconInfoAllocCount.counter);
 517         seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 518                         bufAllocCount.counter,
 519                         cifs_min_rcv + tcpSesAllocCount.counter);
 520         seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 521                         smBufAllocCount.counter, cifs_min_small);
 522 #ifdef CONFIG_CIFS_STATS2
 523         seq_printf(m, "Total Large %d Small %d Allocations\n",
 524                                 atomic_read(&totBufAllocCount),
 525                                 atomic_read(&totSmBufAllocCount));
 526 #endif /* CONFIG_CIFS_STATS2 */
 527
 528         seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount));
 529         seq_printf(m,
 530                 "\n%d session %d share reconnects\n",
 531                 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
 532
 533         seq_printf(m,
 534                 "Total vfs operations: %d maximum at one time: %d\n",
 535                 GlobalCurrentXid, GlobalMaxActiveXid);
 536
 537         i = 0;
 538         spin_lock(&cifs_tcp_ses_lock);
 539         list_for_each(tmp1, &cifs_tcp_ses_list) {
 540                 server = list_entry(tmp1, struct TCP_Server_Info,
 541                                     tcp_ses_list);
 542 #ifdef CONFIG_CIFS_STATS2
 543                 seq_puts(m, "\nTotal time spent processing by command. Time ");
 544                 seq_printf(m, "units are jiffies (%d per second)\n", HZ);
 545                 seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
 546                 seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
 547                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 548                         seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
 549                                 atomic_read(&server->num_cmds[j]),
 550                                 server->time_per_cmd[j],
 551                                 server->fastest_cmd[j],
 552                                 server->slowest_cmd[j]);
 553                 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 554                         if (atomic_read(&server->smb2slowcmd[j]))
 555                                 seq_printf(m, "  %d slow responses from %s for command %d\n",
 556                                         atomic_read(&server->smb2slowcmd[j]),
 557                                         server->hostname, j);
 558 #endif /* STATS2 */
 559                 list_for_each(tmp2, &server->smb_ses_list) {
 560                         ses = list_entry(tmp2, struct cifs_ses,
 561                                          smb_ses_list);
 562                         list_for_each(tmp3, &ses->tcon_list) {
 563                                 tcon = list_entry(tmp3,
 564                                                   struct cifs_tcon,
 565                                                   tcon_list);
 566                                 i++;
 567                                 seq_printf(m, "\n%d) %s", i, tcon->treeName);
 568                                 if (tcon->need_reconnect)
 569                                         seq_puts(m, "\tDISCONNECTED ");
 570                                 seq_printf(m, "\nSMBs: %d",
 571                                            atomic_read(&tcon->num_smbs_sent));
 572                                 if (server->ops->print_stats)
 573                                         server->ops->print_stats(m, tcon);
 574                         }
 575                 }
 576         }
 577         spin_unlock(&cifs_tcp_ses_lock);
 578
 579         seq_putc(m, '\n');
 580         return 0;
 581 }
 582
 583 static int cifs_stats_proc_open(struct inode *inode, struct file *file)
 584 {
 585         return single_open(file, cifs_stats_proc_show, NULL);
 586 }
 587
 588 static const struct file_operations cifs_stats_proc_fops = {
 589         .open           = cifs_stats_proc_open,
 590         .read           = seq_read,
 591         .llseek         = seq_lseek,
 592         .release        = single_release,
 593         .write          = cifs_stats_proc_write,
 594 };
 595
 596 #ifdef CONFIG_CIFS_SMB_DIRECT
 597 #define PROC_FILE_DEFINE(name) \
 598 static ssize_t name##_write(struct file *file, const char __user *buffer, \
 599         size_t count, loff_t *ppos) \
 600 { \
 601         int rc; \
 602         rc = kstrtoint_from_user(buffer, count, 10, & name); \
 603         if (rc) \
 604                 return rc; \
 605         return count; \
 606 } \
 607 static int name##_proc_show(struct seq_file *m, void *v) \
 608 { \
 609         seq_printf(m, "%d\n", name ); \
 610         return 0; \
 611 } \
 612 static int name##_open(struct inode *inode, struct file *file) \
 613 { \
 614         return single_open(file, name##_proc_show, NULL); \
 615 } \
 616 \
 617 static const struct file_operations cifs_##name##_proc_fops = { \
 618         .open           = name##_open, \
 619         .read           = seq_read, \
 620         .llseek         = seq_lseek, \
 621         .release        = single_release, \
 622         .write          = name##_write, \
 623 }
 624
 625 PROC_FILE_DEFINE(rdma_readwrite_threshold);
 626 PROC_FILE_DEFINE(smbd_max_frmr_depth);
 627 PROC_FILE_DEFINE(smbd_keep_alive_interval);
 628 PROC_FILE_DEFINE(smbd_max_receive_size);
 629 PROC_FILE_DEFINE(smbd_max_fragmented_recv_size);
 630 PROC_FILE_DEFINE(smbd_max_send_size);
 631 PROC_FILE_DEFINE(smbd_send_credit_target);
 632 PROC_FILE_DEFINE(smbd_receive_credit_max);
 633 #endif
 634
 635 static struct proc_dir_entry *proc_fs_cifs;
 636 static const struct file_operations cifsFYI_proc_fops;
 637 static const struct file_operations cifs_lookup_cache_proc_fops;
 638 static const struct file_operations traceSMB_proc_fops;
 639 static const struct file_operations cifs_security_flags_proc_fops;
 640 static const struct file_operations cifs_linux_ext_proc_fops;
 641
 642 void
 643 cifs_proc_init(void)
 644 {
 645         proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 646         if (proc_fs_cifs == NULL)
 647                 return;
 648
 649         proc_create_single("DebugData", 0, proc_fs_cifs,
 650                         cifs_debug_data_proc_show);
 651
 652         proc_create_single("open_files", 0400, proc_fs_cifs,
 653                         cifs_debug_files_proc_show);
 654
 655         proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops);
 656         proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops);
 657         proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops);
 658         proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs,
 659                     &cifs_linux_ext_proc_fops);
 660         proc_create("SecurityFlags", 0644, proc_fs_cifs,
 661                     &cifs_security_flags_proc_fops);
 662         proc_create("LookupCacheEnabled", 0644, proc_fs_cifs,
 663                     &cifs_lookup_cache_proc_fops);
 664
 665 #ifdef CONFIG_CIFS_DFS_UPCALL
 666         proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops);
 667 #endif
 668
 669 #ifdef CONFIG_CIFS_SMB_DIRECT
 670         proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs,
 671                 &cifs_rdma_readwrite_threshold_proc_fops);
 672         proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs,
 673                 &cifs_smbd_max_frmr_depth_proc_fops);
 674         proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs,
 675                 &cifs_smbd_keep_alive_interval_proc_fops);
 676         proc_create("smbd_max_receive_size", 0644, proc_fs_cifs,
 677                 &cifs_smbd_max_receive_size_proc_fops);
 678         proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs,
 679                 &cifs_smbd_max_fragmented_recv_size_proc_fops);
 680         proc_create("smbd_max_send_size", 0644, proc_fs_cifs,
 681                 &cifs_smbd_max_send_size_proc_fops);
 682         proc_create("smbd_send_credit_target", 0644, proc_fs_cifs,
 683                 &cifs_smbd_send_credit_target_proc_fops);
 684         proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs,
 685                 &cifs_smbd_receive_credit_max_proc_fops);
 686 #endif
 687 }
 688
 689 void
 690 cifs_proc_clean(void)
 691 {
 692         if (proc_fs_cifs == NULL)
 693                 return;
 694
 695         remove_proc_entry("DebugData", proc_fs_cifs);
 696         remove_proc_entry("open_files", proc_fs_cifs);
 697         remove_proc_entry("cifsFYI", proc_fs_cifs);
 698         remove_proc_entry("traceSMB", proc_fs_cifs);
 699         remove_proc_entry("Stats", proc_fs_cifs);
 700         remove_proc_entry("SecurityFlags", proc_fs_cifs);
 701         remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 702         remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 703
 704 #ifdef CONFIG_CIFS_DFS_UPCALL
 705         remove_proc_entry("dfscache", proc_fs_cifs);
 706 #endif
 707 #ifdef CONFIG_CIFS_SMB_DIRECT
 708         remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs);
 709         remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs);
 710         remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs);
 711         remove_proc_entry("smbd_max_receive_size", proc_fs_cifs);
 712         remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs);
 713         remove_proc_entry("smbd_max_send_size", proc_fs_cifs);
 714         remove_proc_entry("smbd_send_credit_target", proc_fs_cifs);
 715         remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs);
 716 #endif
 717         remove_proc_entry("fs/cifs", NULL);
 718 }
 719
 720 static int cifsFYI_proc_show(struct seq_file *m, void *v)
 721 {
 722         seq_printf(m, "%d\n", cifsFYI);
 723         return 0;
 724 }
 725
 726 static int cifsFYI_proc_open(struct inode *inode, struct file *file)
 727 {
 728         return single_open(file, cifsFYI_proc_show, NULL);
 729 }
 730
 731 static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
 732                 size_t count, loff_t *ppos)
 733 {
 734         char c[2] = { '\0' };
 735         bool bv;
 736         int rc;
 737
 738         rc = get_user(c[0], buffer);
 739         if (rc)
 740                 return rc;
 741         if (strtobool(c, &bv) == 0)
 742                 cifsFYI = bv;
 743         else if ((c[0] > '1') && (c[0] <= '9'))
 744                 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */
 745         else
 746                 return -EINVAL;
 747
 748         return count;
 749 }
 750
 751 static const struct file_operations cifsFYI_proc_fops = {
 752         .open           = cifsFYI_proc_open,
 753         .read           = seq_read,
 754         .llseek         = seq_lseek,
 755         .release        = single_release,
 756         .write          = cifsFYI_proc_write,
 757 };
 758
 759 static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
 760 {
 761         seq_printf(m, "%d\n", linuxExtEnabled);
 762         return 0;
 763 }
 764
 765 static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
 766 {
 767         return single_open(file, cifs_linux_ext_proc_show, NULL);
 768 }
 769
 770 static ssize_t cifs_linux_ext_proc_write(struct file *file,
 771                 const char __user *buffer, size_t count, loff_t *ppos)
 772 {
 773         int rc;
 774
 775         rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled);
 776         if (rc)
 777                 return rc;
 778
 779         return count;
 780 }
 781
 782 static const struct file_operations cifs_linux_ext_proc_fops = {
 783         .open           = cifs_linux_ext_proc_open,
 784         .read           = seq_read,
 785         .llseek         = seq_lseek,
 786         .release        = single_release,
 787         .write          = cifs_linux_ext_proc_write,
 788 };
 789
 790 static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 791 {
 792         seq_printf(m, "%d\n", lookupCacheEnabled);
 793         return 0;
 794 }
 795
 796 static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
 797 {
 798         return single_open(file, cifs_lookup_cache_proc_show, NULL);
 799 }
 800
 801 static ssize_t cifs_lookup_cache_proc_write(struct file *file,
 802                 const char __user *buffer, size_t count, loff_t *ppos)
 803 {
 804         int rc;
 805
 806         rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled);
 807         if (rc)
 808                 return rc;
 809
 810         return count;
 811 }
 812
 813 static const struct file_operations cifs_lookup_cache_proc_fops = {
 814         .open           = cifs_lookup_cache_proc_open,
 815         .read           = seq_read,
 816         .llseek         = seq_lseek,
 817         .release        = single_release,
 818         .write          = cifs_lookup_cache_proc_write,
 819 };
 820
 821 static int traceSMB_proc_show(struct seq_file *m, void *v)
 822 {
 823         seq_printf(m, "%d\n", traceSMB);
 824         return 0;
 825 }
 826
 827 static int traceSMB_proc_open(struct inode *inode, struct file *file)
 828 {
 829         return single_open(file, traceSMB_proc_show, NULL);
 830 }
 831
 832 static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
 833                 size_t count, loff_t *ppos)
 834 {
 835         int rc;
 836
 837         rc = kstrtobool_from_user(buffer, count, &traceSMB);
 838         if (rc)
 839                 return rc;
 840
 841         return count;
 842 }
 843
 844 static const struct file_operations traceSMB_proc_fops = {
 845         .open           = traceSMB_proc_open,
 846         .read           = seq_read,
 847         .llseek         = seq_lseek,
 848         .release        = single_release,
 849         .write          = traceSMB_proc_write,
 850 };
 851
 852 static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
 853 {
 854         seq_printf(m, "0x%x\n", global_secflags);
 855         return 0;
 856 }
 857
 858 static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
 859 {
 860         return single_open(file, cifs_security_flags_proc_show, NULL);
 861 }
 862
 863 /*
 864  * Ensure that if someone sets a MUST flag, that we disable all other MAY
 865  * flags except for the ones corresponding to the given MUST flag. If there are
 866  * multiple MUST flags, then try to prefer more secure ones.
 867  */
 868 static void
 869 cifs_security_flags_handle_must_flags(unsigned int *flags)
 870 {
 871         unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
 872
 873         if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 874                 *flags = CIFSSEC_MUST_KRB5;
 875         else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
 876                 *flags = CIFSSEC_MUST_NTLMSSP;
 877         else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
 878                 *flags = CIFSSEC_MUST_NTLMV2;
 879         else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
 880                 *flags = CIFSSEC_MUST_NTLM;
 881         else if (CIFSSEC_MUST_LANMAN &&
 882                  (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
 883                 *flags = CIFSSEC_MUST_LANMAN;
 884         else if (CIFSSEC_MUST_PLNTXT &&
 885                  (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
 886                 *flags = CIFSSEC_MUST_PLNTXT;
 887
 888         *flags |= signflags;
 889 }
 890
 891 static ssize_t cifs_security_flags_proc_write(struct file *file,
 892                 const char __user *buffer, size_t count, loff_t *ppos)
 893 {
 894         int rc;
 895         unsigned int flags;
 896         char flags_string[12];
 897         bool bv;
 898
 899         if ((count < 1) || (count > 11))
 900                 return -EINVAL;
 901
 902         memset(flags_string, 0, 12);
 903
 904         if (copy_from_user(flags_string, buffer, count))
 905                 return -EFAULT;
 906
 907         if (count < 3) {
 908                 /* single char or single char followed by null */
 909                 if (strtobool(flags_string, &bv) == 0) {
 910                         global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF;
 911                         return count;
 912                 } else if (!isdigit(flags_string[0])) {
 913                         cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 914                                         flags_string);
 915                         return -EINVAL;
 916                 }
 917         }
 918
 919         /* else we have a number */
 920         rc = kstrtouint(flags_string, 0, &flags);
 921         if (rc) {
 922                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
 923                                 flags_string);
 924                 return rc;
 925         }
 926
 927         cifs_dbg(FYI, "sec flags 0x%x\n", flags);
 928
 929         if (flags == 0)  {
 930                 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
 931                 return -EINVAL;
 932         }
 933
 934         if (flags & ~CIFSSEC_MASK) {
 935                 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
 936                          flags & ~CIFSSEC_MASK);
 937                 return -EINVAL;
 938         }
 939
 940         cifs_security_flags_handle_must_flags(&flags);
 941
 942         /* flags look ok - update the global security flags for cifs module */
 943         global_secflags = flags;
 944         if (global_secflags & CIFSSEC_MUST_SIGN) {
 945                 /* requiring signing implies signing is allowed */
 946                 global_secflags |= CIFSSEC_MAY_SIGN;
 947                 cifs_dbg(FYI, "packet signing now required\n");
 948         } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
 949                 cifs_dbg(FYI, "packet signing disabled\n");
 950         }
 951         /* BB should we turn on MAY flags for other MUST options? */
 952         return count;
 953 }
 954
 955 static const struct file_operations cifs_security_flags_proc_fops = {
 956         .open           = cifs_security_flags_proc_open,
 957         .read           = seq_read,
 958         .llseek         = seq_lseek,
 959         .release        = single_release,
 960         .write          = cifs_security_flags_proc_write,
 961 };
 962 #else
 963 inline void cifs_proc_init(void)
 964 {
 965 }
 966
 967 inline void cifs_proc_clean(void)
 968 {
 969 }
 970 #endif /* PROC_FS */